论文标题
在多光盒中与检测效率不匹配的量子密钥分布的安全性
Security of quantum key distribution with detection-efficiency mismatch in the multiphoton case
论文作者
论文摘要
检测效率不匹配是实用量子密钥分布（QKD）系统中的一个常见问题。具有检测效率不匹配的QKD的当前安全性证明依赖于发件人侧的单光子灯源的假设，也取决于接收器端的单光子输入的假设。这些假设对可能的窃听策略施加了限制。在这里，我们提供了一个严格的安全性证明，没有这些假设，因此解决了这个重要问题，并证明了QKD的安全性，而检测效率不匹配对一般攻击（在渐近制度中）。特别是，我们将诱饵状态方法调整为检测效率不匹配的情况。
Detection-efficiency mismatch is a common problem in practical quantum key distribution (QKD) systems. Current security proofs of QKD with detection-efficiency mismatch rely either on the assumption of the single-photon light source on the sender side or on the assumption of the single-photon input of the receiver side. These assumptions impose restrictions on the class of possible eavesdropping strategies. Here we present a rigorous security proof without these assumptions and, thus, solve this important problem and prove the security of QKD with detection-efficiency mismatch against general attacks (in the asymptotic regime). In particular, we adapt the decoy state method to the case of detection-efficiency mismatch.
